Concrete form structure for use in construction of concrete floors and the like



Oct. 7, 1958 R. E. STROUD 2,

CONCRETE FORM STRUCTURE FOR USE IN CONSTRUCTION 0F CONCRETE FLOORS ANDTHE LIKE Filed May 11, 1955 3 Sheets-Sheet 1 INVENTOR m P/-/ L. 5 rem/0ATTORNEYS Oct. 7, 1958 R. E. STROUD 2,854,726

CONCRETE FORM STRUCTURE FOR USE IN CONSTRUCTION OF CONCRETE FLOORS ANDTHE LIKE s Sheets-sheaf; 2

Filed May 11, 1955 INVENTOR Rap 5 577F000 Econ a w Oct. 7, 1958 R. E.STROUD 2,854,725 CONCRETE FORM STRUCTURE FOR USE IN CONSTRUCTION OFCONCRETE FLOORS AND THE LIKE 3 Sheets-Sheet 3 Filed May 11, 1955 WMW/ YZM/AW WW} I ATTORNEZS United States PatentO CONCRETE FORM STRUCTURE FORUSE IN CON- i'EIEIIDJCTION F CONCRETE FLOORS AND THE Ralph E. Stroud,San Antonio, Tex.

Application May 11, 1955, Serial No. 507,529

2 Claims. (Cl. 25-1315) The present invention relates to concrete formstructure for use in construction of concrete floors and the like andhas for an object to provide forms or pans of steel or other suitablematerial preferably of the long span type in which certain adjustmentsare made possible to provide for the rib joists of the concrete invarious widths and depths and to accommodate forms of different widthsand heights, all to the end of materially reducing the cost of concreteconstructions and to provide a type of form which can be used with anybuilding specifications with a minimum amount of equipment.

The invention has for another object to provide an adjustable bracketadapted to be afiixed at varying heights to the shoring or false workwhich will act to bind the filler forms for the bases of the concreterib joists to the main arch forming pans for supporting these fillerforms at desirable elevations between the main pans to control the depthof the concrete rib joists.

A still further object of the invention is to provide certain adjunctsto .the pans and forms which will enable long span forms to producebetter finishes in the concrete with less equipment and with lesscapital investment in such equipment.

With the foregoing and other objects in view, the invention will be morefully described hereinafter, and will be more particularly pointed outin the claims appended hereto. r

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views:

Figure 1 is a fragmentary perspective view of a concrete form structurefor use in construction of concrete floors and the like according to thepresent invention and showing all of the parts assembled and concretepoured to form the floor slab and ribs joints between the form pans.

Figure 2 is a fragmentary end elevational view of the same.

Figure 3 is a longitudinal construction.

Figure 4 is a fragmentary perspective view of a variety section takenthrough the of filler forms to be mounted between the main arch pans inorder to mold the bottom of the rib joists of concrete.

Figure 5 is a similar view showing a double or lapped type of fillerform.

Figure 6 is also a fragmentary perspective view of a lap type of fillerform used at the end of the main filler form to fill out the latter soas to complete the support for the concrete rib joists.

Figure 7 is a perspective view of a type of end filler form useful atthe end of the main filler form to form the beam side.

Figure 8 is'a perspective view of a form of end cap for fitting to theends of the arch forming pans.

Figure 9 is a perspective view of a form of adjustable bracket forbinding the filler forms to the main pans at varying elevations.

Figure 10 is an edge view of the adjustable bracket. Figure 11 is aperspective view of a modified form of 2,854,726 4 Patented Oct. 7,'1958 adjustable bracket to be used on the last row of forms next to beamto form Ts at beams.

. the desired depth. In fitting the brackets 29 in place, the

Figure 12 is a perspective view of a type of clamp which may be employedto hold the pans and forms together between the adjustable brackets.

Figure 13 is a vertical cross-sectional view through the filler form andadjacent wall of a pan showing a form of clamp applied thereto.

Referring more particularly to the drawings, and for the present toFigures 1, 2 and 3, 20 designates the concrete floor slab and 21 theconcrete rib joists which have been shown as already poured and moldedupon the arch forming pans 22 and other molding equipment hereinaftermore particularly described, which is assembled together as illustratedin these figures.

The pans 22 have preferably downwardly divergent side walls 23 belowwhich are substantially vertical lower side walls 24, resting at theirlower edges upon wooden or other joists 25 supported by the shoring orfalse work 26.

As shown more particularly in Figure 2 the concrete rib joists 21 are ofdifferent widths and different depths to illustrate the adjustablefeatures of the improved device. Also in this figure the pans 22 areshown to be of different widths.

Between the pans 22 are filler forms 27 for forming the lower portionsof the concrete rib joints. These filler forms 27, pursuant to theillustration of Figure 4 have downwardly extending flanges 28 adapted tobe abutted by the straight or vertical lower side walls 24 of adjacentpans 22, as shown more particularly in Figures 1 and 2. In these figuresthe tiller forms 27 are shown as being carried at various elevationsbythe walls 24 of the pans 22, this being accomplished by the use ofadjustable supports or brackets 29 which are of the general form of theletter E, these adjustable brackets 29 being illustrated moreparticularly in Figures 9, 10 and 11. The form of bracket illustrated inthese figures comprises generally a lower or horizontal bar 30, acentral upstanding bar 31 and end upstanding bars 32 and 33 which arespaced in opposite directions from the central upstanding bar 31 so asto provide therebetween slots 35 and 36 which open upwardly through theupper edge of the bracket 29. A vertical row of perforations 34 in thecentral bar 31 which preferably extend down into the horizontal bar 30provide for receiving therethrough nails or other fastenings by whichthe bracket may be secured to the wooden joists 25 or to some other partof the scaffolding or shoring.

The central upstanding bar 31 carries a cross bar 37 on a screw bolt 38which is threaded into an internally threaded nut 39 welded or otherwisesecured to the opposite side of the central upstanding bar 31 near itsupper portion.

Other nuts, internally threaded, designated at 40 and 41 are welded,preferably to the same sides of the end upstanding bars 32, 33 but inedgewise fashion so that the threaded openings through these nuts 40 and.41 are substantially in axial alignment. The nuts 40 and 41 receivescrew bolts 42 and 43.

It will be clear from Figures 1 and 2, that the central variouselevations as shown in Figures 1 and 2, the crossbar'37 will carry theinvolved filler form 27 at the requisite elevation in order to form aconcrete rib joist of screw bolts 42 and 43 will be initially retractedand care will have to be exercised in order to move adjacent pans 22sufficiently together upon the intervening filler form 27 so that theadjacent walls 24 of the pans 22 will be received in the slots 35,;36ofthe brackets 29, with the inner free ends of the screw bolts, 42, 43poised to engage the inner faces of the walls 24 when these screw bolts42, 43 are rotated in the appropriate direction to cause the bolts toclose in upon the walls 24. In this way the walls 24 are clamped tightlyto the flanges 28 of the filler form 27 lying between adjacent pans 22so that the concrete or any liquid will be prevented from escapingdownwardly in spaces between the tiller forms and the adjacent pans 22.The lower edges of the pans 22 will rest upon the wooden beams or otherparts of the shoring or false work.

Referring more particularly to Figure 11, a modified form of adjustablebracket 29 is shown comprising a bottom bar 30 having only twoupstanding bars 31 and 32 separated by slot 35 for the purpose shown atthe extreme right hand end of Figure 2 of receiving therein the lowerportion of the adjacent wall 24 of the pan 22 at the end of thestructure. The upstanding bar 31 is provided with a vertical series ofspaced perforations or holes '34 to receivea nail, nails or otherfastenings for securing the bracket 29*- to a part of the scaffolding orthe like. This modified form of bracket 29 carries a nut 40 projectingoutwardly from the upper portion of the upstanding bar 32 to receivetherethrough the threaded portion of the bolt 42 by which pressure isapplied to the inside surface of the wall or leg 24 of the end pan 22 tothus draw the filler form 27 which might be also characterized as therib joist form against the outside surface of this same wall 24. Theupper end of the upstanding bar 31"- may if desired carry a cross-barsuch as a cross-bar 37 of Figure 9. However such cross-bar will notalways be required. It is preferable however to provide an enlargement44 at the upper end of the upstanding bar 31. An inclined edge surface45 may lead from the narrower lower portion of the upstanding bar 31 tothe enlarged upper end 44.

The modified form of bracket 29 of Figure 11 is used on the last row offorms or pans 22 next to the beam 46 as shown at the extreme right handend of Figures 1 and 2. This is for the purpose of forming Ts at thebeams 46.

Referring more particularly to Figure 5 a double form of filler form orrib joist form is illustrated in which two webs 27 and 27? areoverlapped to a desired extent in order to space the flanges 28 adesireddistance apart. The overlapped portions of the webs 2.7 and 27 maybewelded or otherwise secured together to provide the completed form. Suchdouble concrete joist forms are used to form extra wide concrete joists.

Referring more particularly to Figure 6 a form of lap rid joist form 27is shown having depending spaced longitudinal flanges 28 and aprojecting web ledge 47 at one end thereof. This lap rib joist form isused at the end of the main filler form 27 as. shown at the extreme endof Figure 3 for the purpose of filling out the form 27 for the bottom ofthe concrete rib joist. As

shown in Figure 3 the projecting web ledge 47 may lap over the adjacentbeam 48 of the shoring or other false structure, while the flanges 28may abut against the adjacent edge of this beam 48.

Referring more particularly to Figure 7 an end filler form 27 is shownhaving flanges 28 similar to the web 27 and flanges 2.; of Figure 4.This device 27 is used at the end of the main filler form 27 to formbeam side. For this purpose the web is formed with a downturned end wall49 and with side flanges 50 which are continuations of the flanges 28However the lower portions of the flanges 50 are cut away as shown at'51. The downturned end wall 49 may be provided with two'rows ofperforations if desired to receive nails or other fastenings by whichthis end wall 49 is affixed to abutting portions of the shoring or falsework. The position of this end member 27 is shown at the extreme righthand end of Figure 3, the cut-out portion 51 being provided to fit acomplemental upper portion of the beam 52.

Referring more particularly to Figure 8 a form of end cap 53 is shownhaving downwardly divergent side Walls 54 and substantially straightvertical lower walls 55. The caps are provided with closed end walls 56with downwardly projecting flanges 57. The pan end caps 53 are alsoprovided with projections 58 in the top portions thereof for removingthe cap from the concrete. These projections 58 may be in the form ofangle irons. The caps are made of any suitable material and in anysuitable dimensions. As shown in Figure 3 these pan end caps are adaptedto be fitted to the ends of the pans 22 so as to complete the span ofthe pans 22 over to the ends of the false work with part of which thedownwardly depending flange 57 may be engaged to properly locate the endcaps 53. 7

Other similar caps 53*, shown in the central portion of Figure 3 andgenerally referred to as Dia Caps are so called because these caps areused at the diaphragm and are generally of smaller longitudinaldimensions.

59 designates a U-shaped clamp which comprises generally the spaced sidewalls 60, 61 and the bottom connecting yoke 62. The clamp is open at itsopposite ends and through its upper portion and carries upon one wall,for example the wall 60 an internally threaded nut 63 which may bewelded against rotary movement to the external portion of the wall 60. Athreaded bolt 64 engag'es with the internal threads of the nut 63 andpasses freely through an opening in the wall 60 so that inner end of thebolt 64 projects into the clamp space between walls 60 and 61 as shownin Figure 13. The upper end of the inner wall 61 is adapted to engagewithin one of the flanges 28 of the filler form 27 while the upperportion of the outer clamp wall 60 fits within the lower portion of awall of the pan 22 so that the inner end of the threaded bolt 64 will bein a position to engage the inner surface of the vertical wall 24 of thepan in order to clamp the pan 22 and the filler form 27 together. As theadjustable brackets 29 can only be affixed at points where the falsework 25 is available for carrying these adjustable brackets 29, theclamps 59 are of such construction that While embracing the parts 24 and28 they will also themselves be supported by these parts so that as manyof these clamps 59 as desired may be connected between the walls .24 andflanges 28 all along the span between beams 25 of the false work. Inthis way tight joints may be maintained between the filler forms 27 andthe near walls 24 of adjacent pans 22.

It will be understood by those in the art that all of the parts hereindescribed may be made in any dimensions, of any length, height, widthand breadth and in any sizes, of any lengths. It is also to beunderstood that all of the parts herein described may be made of anydesired material, for instance cold-rolled steel of appropriate gage.

The pans and forms are preferably of long span type which are alsoadjustable, and it will be understood by those skilled in the art thatthe use of the present construction will materially lessen the cost ofconcrete structures and with a minimum amount of equipment as theformand pan herein illustrated and described can be used to any buildingspecifications.

The forms and pans may be of any depths. For instance the pans may be oftwo depths. In one case the depth will be sixteen inches, the same beingadjustable to three depths, ten inches, twelve inches, and fourteeninches. This size is known as the type B steelform. The other size istwelve inches deep and is adjustable 'to three depths also, six inches,eight inches and ten inches. This size is known as type A steelform.Both types are in four widths, ten inches, fifteen inches, twenty inches5. and thirty inches. Both types are in lengths from one foot long toany desired length. However, they will very seldom be longer than twelvefeet. With the twelve inch width the improved end cap and a twelve footlong form and pan the adjustment is from twelve feet to thirteen feetten inches, which in most cases is sufiicient length.

The two inch width Dia or diaphragm end cap 53 (Figure 3) is designedfor use where a diaphragm is specified in the building. With a diaphragmtwo steel forms are required; therefore with twotwelve feet long pansaccording to the invention a span of twenty-seven feet eight inches canbe covered.

Standard lengths for the improved pans may be four feet, six feet, eightfeet, ten feet and twelve feet. However, odd sizes may be necessary attimes, for instance in lengths of one foot to any length.

The filler forms 27 are separated from the pans 22 to enable adjustmentof the filler forms 27. The standard widths of the filler forms 27 maybe four inches, five inches and six inches but the same may be availablein other widths. The double filler form of Figure 5 is designed tocompensate for extra wide concrete ribs 21. This Figure 5 form of fillerform may be used for odd sizes as well. The end lap filler form ofFigure 6 was designed to form the beam sides of shallow beams where thepan bears. This is a feature that will provide cheaper framing ofconcrete structure. The lap filler form section of Figure 6 has beendesigned to cover the space covered also by the end caps 53 at each endof each row of pans.

It will be appreciated that the present invention provides an adjustablelong span steelform which will give a better concrete finish for lesscost and with less equipment.

Type A and type B forms are of two different depths, as heretoforeexplained. The adjustable feature, which is an important feature of theinvention, is accomplished with bracket 29 as explained in column 2. InFigure 2, the longitudinal section shows the bracket 29 nailed orfastened to the wooden beam or strong back 25 at different elevations.This is the adjustable feature. In a slab where the rib joists arespecified to fourteen (14) inches, the type B form will be used, thebracket 29 will be nailed or fastened to the wooden beam 25 at thespacing shown in the center of Figure 2. If the depth specified is teninches, the brackets 29 will be set as the drawing shows in Figure 2 tothe extreme left, and so for each depth desired. In lesser depths, thetype A form will be used in the same manner as type B. The sameadjustment is possible with the end cap 53 as shown in Figure 8, and asexplained in column 4. The lower side walls 55 on the end cap, and thelower side walls 24 of the pan and form are the portions of the formwhere the adjustment is made. By lowering or raising the bracket 29 onthe wooden beam 25, an operator obtains different depths from the top ofthe concrete slab. In the type A, there are three different depths.These six depths are to standard construction code. However, with thisnew form, as herein disclosed, odd depths can be obtained if anarchitect so desires.

Although I have disclosed herein the best form of the invention known tome at this time, I reserve the right to all such modifications andchanges as may come within the scope of the following claims.

What is claimed is:

1. An adjusting device for channel shaped filler forms between archedpans supported by false work comprising a support having means adaptingthe same for attach ment at varying elevations to parts of the falsework, a crossbar carried by the upper portion of the support and adaptedto enter the channel shaped forms, said support and said crossbar beingin substantially parallel planes, said crossbar being carried by thesupport for pivotal movement in its plane substantially parallel to saidplane of the support, and means for binding the crossbar in adjustedposition so that it can enter the channel shaped form and support thesame.

2. An adjusting device for the channel filler forms between arch panssupported by false work comprising a support having means whereby thesame may be attached at varying elevations to the false work, meanscarried by the upper portion of the support for substantially spanningthe space between the side flanges of the channel for supporting theform, said support and said means being in substantially parallel planeswith said means mounted on said support for pivotal movement in itsplane substantially parallel to said plane of the support, and meanscarried by the support and adjustable toward and from adjacent sidewallsof the pans for engaging the adjacent sidewall of the pan for acting tomove said adjacent sidewall upon the adjacent flange of the includedfiller form.

References Cited in the file of this patent UNITED STATES PATENTS Re.14,278 Hammett Mar. 27, 1917 620,495 Ramseaur Feb. 28, 1899 1,020,164Symons Mar. 12, 1912 1,131,479 Dale Mar. 9, 1915 1,227,769 Fitch May 29,1917 1,388,273 Lefiler Aug. 23, 1921 1,452,983 Rath Apr. 24, 19231,470,729 Hall Oct. 16, 1923 1,546,586 Johnson 1 July 21, 1925 1,689,151Mercer et al. Oct. 23, 1928 1,891,557 Roos Dec. 20, 1932 2,296,782Fischer et al. Sept. 22, 1942 FOREIGN PATENTS 585,657 France Dec. 12,1924 368,755 Germany Feb. 12, 1923 237,438 Great Britain July 30, 1925

